{"product_id":"pololu-3-3v-3-7a-step-down-voltage-regulator-d30v30f3","title":"Pololu 3.3V 3.7A Step-Down Voltage Regulator D30V30F3","description":"\u003cp\u003eThe \u003ca href=\"\/hi\/collections\/pololu\"\u003ePololu\u003c\/a\u003e D30V3x line of synchronous buck (step-down) \u003ca href=\"\/hi\/collections\/voltage-regulators-buck-converters\"\u003evoltage regulators\u003c\/a\u003e generates lower output voltages from input voltages as high as 45V. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters), which makes them much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large.\u003c\/p\u003e\n\u003cp\u003eThis particular model (D30V30\u003cstrong\u003eF3\u003c\/strong\u003e) takes an \u003cstrong\u003einput of 3.3V to 45V\u003c\/strong\u003e and \u003cstrong\u003eoutputs a fixed 3.3V\u003c\/strong\u003e with a \u003cstrong\u003etypical continuous output current of 3.7A\u003c\/strong\u003e. In general, the available output current decreases as the input and output voltages increase.\u003c\/p\u003e\n\u003cp\u003eThe regulators have reverse-voltage protection up to 40V, input under-voltage lockout, over-current protection, and short-circuit protection. A thermal shutdown feature also helps prevent damage from overheating and a soft-start feature limits the inrush current and gradually ramps the output voltage on startup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarning: During normal operation, this product can get hot enough to burn you.\u003c\/strong\u003e Take care when handling this product or other components connected to it.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput voltage: 3.3V to 45V\u003c\/strong\u003e (minimum input subject to dropout voltage considerations; see the dropout voltage section for details)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput voltage: 3.3V\u003c\/strong\u003e with \u003cstrong\u003e4% accuracy\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical maximum continuous output current: 3A to 4.5A\u003c\/strong\u003e (see the maximum continuous output current graph below)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical efficiency of 80% to 95%\u003c\/strong\u003e, depending on input voltage, output voltage, and load (see the efficiency graph below)\u003c\/li\u003e\n\u003cli\u003eVery low dropout voltage\u003c\/li\u003e\n\u003cli\u003eSwitching frequency: ~700 kHz under heavy loads\u003c\/li\u003e\n\u003cli\u003ePower-save mode that increases light load efficiency by reducing switching frequency\u003c\/li\u003e\n\u003cli\u003eLow quiescent current (see the quiescent current graph below)\u003c\/li\u003e\n\u003cli\u003eEnable input with precise cutoff threshold for disconnecting the load and putting the regulator into a low-power state that draws approximately 10 µA to 20 µA per volt on VIN\u003c\/li\u003e\n\u003cli\u003e“Power good” output indicates when the regulator cannot adequately maintain the output voltage\u003c\/li\u003e\n\u003cli\u003eFrequency spread spectrum operation that lowers peak EMI noise\u003c\/li\u003e\n\u003cli\u003eUnder-voltage lockout protection\u003c\/li\u003e\n\u003cli\u003eSoft-start feature limits inrush current and gradually ramps output voltage\u003c\/li\u003e\n\u003cli\u003eIntegrated reverse-voltage protection up to 40 V, over-current and short-circuit protection, over-temperature shutoff\u003c\/li\u003e\n\u003cli\u003eCompact size: 0.7″ × 0.8″ × 0.355″ (17.8 mm × 20.3 mm × 9 mm); see the \u003ca href=\"https:\/\/www.pololu.com\/file\/0J2002\/d30v30fx-step-down-voltage-regulators-dimensions.pdf\"\u003edimension diagram\u003c\/a\u003e for more information\u003c\/li\u003e\n\u003cli\u003eTwo 0.086″ mounting holes for #2 or M2 screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable width=\"383\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"248\"\u003eMinimum operating voltage\u003c\/td\u003e\n\u003ctd width=\"135\"\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum operating voltage\u003c\/td\u003e\n\u003ctd\u003e45V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous output current\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e3.7A\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput voltage\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReverse voltage protection?\u003c\/td\u003e\n\u003ctd\u003eY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum quiescent current\u003c\/td\u003e\n\u003ctd\u003e9mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput type\u003c\/td\u003e\n\u003ctd\u003efixed 3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e0.7″ × 0.8″ × 0.35″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.3g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePCB dev codes\u003c\/td\u003e\n\u003ctd\u003ereg32a\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther PCB markings\u003c\/td\u003e\n\u003ctd\u003e0J14242\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eUsing the Regulator\u003c\/h2\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cp\u003eThis regulator has six connections: power good (PG), enable (EN), input voltage (VIN), output voltage (VOUT), and two ground (GND) connections.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/D30V30Fx_pinout.jpg?v=1712913917\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe “power good” indicator, \u003cstrong\u003ePG\u003c\/strong\u003e, is an open-drain output that goes low when the regulator’s output voltage either rises more than 7.5% (typical) above or falls more than 9% (typical) below the nominal voltage (with hysteresis). \u003cstrong\u003eAn external pull-up resistor is required to use this pin\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe regulator, which is enabled by default, can be put into a low-power sleep state by reducing the voltage on the \u003cstrong\u003eEN\u003c\/strong\u003e pin below 0.85 V (typical; the actual threshold can vary between 0.65 V and 1.05 V from unit to unit), and it can be brought out of this state again by increasing the voltage on EN past 1 V (typical). The shutdown current draw in this sleep mode is dominated by the current in the 100 kΩ pull-up resistor from EN to VIN and in the reverse-voltage protection circuit, which altogether will be between 10 µA and 20 µA per volt on VIN. (Note that for high input voltages, the shutdown current draw when it is disabled can be greater than the quiescent draw while enabled; see the quiescent current graph below for more details.)\u003c\/p\u003e\n\u003cp\u003eA low-voltage cutoff can be set by adding an appropriately sized external pull-down resistor between EN and GND. This resistor and the on-board 100 kΩ pull-up would together form a VIN voltage divider with the output connected to EN.\u003c\/p\u003e\n\u003cp\u003eThe input voltage, \u003cstrong\u003eVIN\u003c\/strong\u003e, powers the regulator. Voltages between 3.3 V and 45 V can be applied to VIN, but generally the effective lower limit of VIN is VOUT plus the regulator’s dropout voltage, which varies approximately linearly with the load (see below for graphs of the dropout voltage as a function of the load).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVOUT\u003c\/strong\u003e is the regulated output voltage.\u003c\/p\u003e\n\u003ch3\u003eTypical efficiency\u003c\/h3\u003e\n\u003cp\u003eThe efficiency of a voltage regulator, defined as (Power out)\/(Power in), is an important measure of its performance, especially when battery life or heat are concerns.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/D30V30F3_efficiency.jpg?v=1712913825\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eMaximum continuous output current\u003c\/h3\u003e\n\u003cp\u003eThe maximum achievable output current of these regulators varies with the input voltage but also depends on other factors, including the ambient temperature, air flow, and heat sinking. The graph below shows the maximum output currents that these regulators can deliver continuously at room temperature in still air and without additional heat sinking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDuring normal operation, this product can get hot enough to burn you.\u003c\/strong\u003e Take care when handling this product or other components connected to it.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/D30V30Fx_max_cont_output_current.jpg?v=1712913825\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eQuiescent current\u003c\/h3\u003e\n\u003cp\u003eThe quiescent current is the current the regulator uses just to power itself, and the graph below shows this for the different regulator versions as a function of the input voltage. The module’s EN input can be driven low to put the board into a low-power state where it typically draws between 10 µA and 20 µA per volt on VIN.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/D30V30Fx_quiescent_current.jpg?v=1712913825\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTypical dropout voltage\u003c\/h3\u003e\n\u003cp\u003eThe dropout voltage of a step-down regulator is the minimum amount by which the input voltage must exceed the regulator’s target output voltage in order to ensure the target output can be achieved. For example, if a 5 V regulator has a 1 V dropout voltage, the input must be at least 6 V to ensure the output is the full 5 V. Generally speaking, the dropout voltage increases as the output current increases. The graph below shows the dropout voltages for the different members of this regulator family:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/D30V30Fx_dropout_voltage.jpg?v=1712914102\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J2002\/d30v30fx-step-down-voltage-regulators-dimensions.pdf\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J2001\/d30v30fx-step-down-voltage-regulators.step\"\u003e3D Model\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J2003\/reg32a-drill.dxf\"\u003eDrill Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cp\u003eA 6×1 straight male header strip and a 5×1 right-angle male header strip are included with the regulator; one pin of the straight header can optionally be separated with a pair of flush cutters and soldered into PG.\u003c\/p\u003e\n\u003cp\u003eThe six connection through-holes are arranged on a 0.1″ grid for compatibility with \u003ca href=\"\/hi\/collections\/solderless-breadboards\"\u003esolderless breadboards\u003c\/a\u003e, connectors, and other prototyping arrangements that use a 0.1″ grid. The PG connection is the only one not located along the edge of the board. \u003c\/p\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":50847428444433,"sku":"POL-4891","price":12.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/pololu-3-3v-3-7a-step-down-voltage-regulator-d30v30f3-pololu-pol-4891-41919326060739.jpg?v=1735213267","url":"https:\/\/abcd3032.myshopify.com\/hi\/products\/pololu-3-3v-3-7a-step-down-voltage-regulator-d30v30f3","provider":"Tayyab Zak","version":"1.0","type":"link"}